Mitsubishi WS-55711 Blink Green LED

Last week, my 55711 died. The remote clicks the set on, then immediately off. When I unplug the set, and replug it back in, the LED just blinks then goes off. I read in the Forum that there is a potential fix. I would like the component list to replace & the schematic, or a suggestion of what else to do.

I'm afraid the fix is ONLY for sets where the green light keeps flashing. You problem is something different. After you turn on the set, and get the regular green blinky lights, hold down the Device and Menu buttons together for about 5 seconds.
The Power light will start to flash in a two digit sequence. Let me know what the blink code is.

MMM That's a tough one man. That is a code 12 which indicates no problem with the set. You will need to check all of the standby and switched power supply voltages with your set. Sorry I could not be more helpful

Hey there, new guy here with the same set and the same problem. I get one flash then two flashes when I hold the menu+device buttons. How do I check the standby and switched voltages?

This problem has been on and off ever since connecting our new DirecTV HD+DVR to the TV. I found that if I turn on the TV then turn on the DTV it would work fine, but the other way around would cause the TV to shut off and the timer light to flash. But now it won't turn on at all.

You need to measure the voltages with a meter. But I would replace the seven capacitors first inside the DM. If you have no solid state repair experience, this s not the do-it-yourself repair job for you. The best advice I can give would be to call out a pro to assist you in this repair. Good Luck

Larry Dillon said:
MMM That's a tough one man. That is a code 12 which indicates no problem with the set. You will need to check all of the standby and switched power supply voltages with your set. Sorry I could not be more helpful

Hi Larry,

As it turns out, it was a bad conversion chip & a blown fuse. I paid $340 to have it fixed. So, at least you know.

Larry Dillon said: MMM That's a tough one man. That is a code 12 which indicates no problem with the set. You will need to check all of the standby and switched power supply voltages with your set. Sorry I could not be more helpful

Hi Larry,
As it turns out, it was a bad conversion chip & a blown fuse. I paid $340 to have it fixed. So, at least you know.
Thanks for your help!
Craig

Do you happen to know where the exact part that was replaced was located? I'm gonna have my set opened to replace some caps and will look at that too.

So the continuos blinking stops? I thought it used to blink all the time? Check the small fuses on the board in the power supply marked on the board as F9A04 and F9A05. Let me know if any of these are open and do not show continuity please.

Larry Dillon said:
So the continuos blinking stops? I thought it used to blink all the time? Check the small fuses on the board in the power supply marked on the board as F9A04 and F9A05. Let me know if any of these are open and do not show continuity please.

I never had continuous blinking. Just the initial blinking when
plugging the set in the no power when pressing the power button.

I checked all the fuses in the set, approximately 10 of them. All
tested good including the ones you listed.

Just had the tech come out and guess what it was... Go ahead guess... Ok, ok I'll tell you. It was three bad buttons on the front control panel. The channel up and down and the volume up buttons. They were shorting and the TV thought they were being pressed and wouldn't turn on.

Short fix was to simply disconnect the panel wire harness from the TV. Long term fix is to replace the bad buttons. That I will do in time, right now I'm going to watch all the shows that were recorded on my DVR while the TV was down!

no doubt! I was in awe that he found that so quickly. He said he's seen it before and when I told him I almost NEVER used the buttons, he said that was the problem. It must have developed some sort of corrosion that conducted electricity causing the short. Crazy for sure.

possibility, but unlikely. My wife knows to leave the TV cleaning to me and I'm very careful when I clean the front. Only mild soap and warm water on a paper towel and a microfiber cloth to dry.

Now there may have been an occasin where our little one mucked up the front with his peanut butter hands and my wife cleaned it without me knowing... but those would be few and far between... at least I hope ;)

My Mitsu 55711 had a blinking code "12". Called my local Mitsu repair guy (who told me how to pull the chassis and he replaced the convergence IC's, I put it back together). He thought about it for a while and told me to pull the speaker covers/front panel and disconnect the front control buttons by pulling the connector behind that control panel apart. Then use only the remote as we had bypassed the buttons on the front. Voila', it works. He told me the buttons get stuck and the TV is confused by having too many tasks. No more green on light, but at least it works.